System Administrator III

Reflexive Concepts is seeking a skilled System Administrator (Level 3) to join our growing team!Reflexive Concepts is seeking a skilled System Administrator to support mission operations sustainment — monitoring, troubleshooting, and maintaining Linux-based high-performance computing systems on a high-impact national security mission.Qualifications Ten (10) years of system administration experienceBachelor's Degree or higher in a related technical fieldAn additional five (5) years of system administration experience may be substituted for the degree, for a total of Fifteen (15) years Required:Linux administration on RHEL, CentOS, Rocky, SLES, or UbuntuOS install, file system configuration, and TCP/IP networkingOperating system and application troubleshootingBASH scripting; software compilation and installDoD 8570 IAT Level II certification (with verification code)Active TS/SCI clearance with full-scope polygraph (most recent poly within 7 years)This position carries an on-call requirement.Desired Skills:Understanding of HPC architecture and high-speed networks (InfiniBand, Slingshot)Familiarity with Jira, Confluence, Grafana, Prometheus, Nagios, Slurm, git, Salt, and AnsibleStrong troubleshooting skills — comfort with the reality that no two systems are exactly alike